
Accession Number : ADA292242
Title : Competitive Analysis of Call Admission Algorithms that Allow Delay.
Descriptive Note : Research rept.,
Corporate Author : CARNEGIEMELLON UNIV PITTSBURGH PA DEPT OF COMPUTER SCIENCE
Personal Author(s) : Feldmann, Anja ; Maggs, Bruce ; Sgall, Jiri ; Sleator, Daniel D. ; Tomkins, Andrew
PDF Url : ADA292242
Report Date : 13 JAN 1995
Pagination or Media Count : 35
Abstract : This paper presents an analysis of several simple online algorithms for processing requests for connections in distributed networks. These algorithms are called call admission algorithms. Each request comes with a source, a destination, and a bandwidth requirement. The call admission algorithm decides whether to accept a request, and if so, when to schedule it and which path the connection should use through the network. The duration of the request is unknown to the algorithm when the request is made. We analyze the performance of the algorithms on simple networks such as linear arrays, trees, and networks with small separators. We use three measures to quantify their performance: makespan, maximum response time, and dataadmission ratio. Our results include a proof that greedy algorithms are logcompetitive with respect to makespan on nnode trees for arbitrary durations and bandwidth, a proof that on an nnode tree no algorithm can be better than Omega (log log n/log log log n) competitive with respect to makespan, and a proof that no algorithm can be better than Omega(log n)competitive with respect to calladmission and dataadmission ratio on a linear array, if each request can be delayed for at most some constant times its (known) duration. (AN)
Descriptors : *ALGORITHMS, *DISTRIBUTED DATA PROCESSING, *COMPUTER NETWORKS, REQUIREMENTS, OPTIMIZATION, COMPETITION, DATA MANAGEMENT, INFORMATION TRANSFER, COMPUTER COMMUNICATIONS, REACTION TIME, INPUT OUTPUT PROCESSING, SCHEDULING, LINEAR ARRAYS, ONLINE SYSTEMS, BANDWIDTH.
Subject Categories : Computer Systems
Computer Programming and Software
Distribution Statement : APPROVED FOR PUBLIC RELEASE